theres a couple videos on YouTube of 5v5 arena on Beta. 5 frost mages were just murdering everything they went up against. + at 80 we'll have Mirror Image so 5v5 becomes 20v5. Talk about confusing the hell out of your opponents. Or you could do arcane Mages and just have everyone Arcane Barrage the same person ( pretty sure not many people can survive 5 3-5k ABarrs at the same time), and so and and so forth until the other team is dead.